Write the functions below and ensure that the tests pass, you can find the tests in the downloaded code.
hasOddNumber
Write a function called hasOddNumber which accepts an array and returns true if the array contains at least one odd number, otherwise it returns false.
hasOddNumber([1,2,2,2,2,2,4]) // true
hasOddNumber([2,2,2,2,2,4]) // false
JavaScript
hasAZero
Write a function called hasAZero which accepts a number and returns true if that number contains at least one zero. Otherwise, the function should return false
hasAZero(33321232131012) // true
hasAZero(1212121) // false
JavaScript
hasOnlyOddNumbers
Write a function called hasOnlyOddNumbers which accepts an array and returns true if every single number in the array is odd. If any of the values in the array are not odd, the function should return false.
hasOnlyOddNumbers([1,3,5,7]) // true
hasOnlyOddNumbers([1,2,3,5,7]) // false
JavaScript
hasNoDuplicates
Write a function called hasNoDuplicates which accepts an array and returns true if there are no duplicate values (more than one element in the array that has the same value as another). If there are any duplicates, the function should return false.
hasNoDuplicates([1,2,3,1]) // false
hasNoDuplicates([1,2,3]) // true
JavaScript
hasCertainKey
Write a function called hasCertainKey which accepts an array of objects and a key, and returns true if every single object in the array contains that key. Otherwise it should return false.
let arr = [
{title: "Instructor", first: 'Elie', last:"Schoppik"},
{title: "Instructor", first: 'Tim', last:"Garcia", isCatOwner: true},
{title: "Instructor", first: 'Matt', last:"Lane"},
{title: "Instructor", first: 'Colt', last:"Steele", isCatOwner: true}
]
hasCertainKey(arr,'first') // true
hasCertainKey(arr,'isCatOwner') // false
JavaScript
hasCertainValue
Write a function called hasCertainValue which accepts an array of objects and a key, and a value, and returns true if every single object in the array contains that value for the specific key. Otherwise it should return false.
let arr = [
{title: "Instructor", first: 'Elie', last:"Schoppik"},
{title: "Instructor", first: 'Tim', last:"Garcia", isCatOwner: true},
{title: "Instructor", first: 'Matt', last:"Lane"},
{title: "Instructor", first: 'Colt', last:"Steele", isCatOwner: true}
]
hasCertainValue(arr,'title','Instructor') // true
hasCertainValue(arr,'first','Elie') // false
JavaScript
Solution